Comparison of thermodynamic properties of cubic Cr 1-x Al x N and Ti 1-x Al x N from first-principles calculations

Alling, Björn, 1980- (author): Linköpings universitet,Tekniska högskolan,Teoretisk Fysik

Marten, Tobias, 1979- (author): Linköpings universitet,Tekniska högskolan,Teoretisk Fysik

Abrikosov, Igor, 1965- (author): Linköpings universitet,Tekniska högskolan,Teoretisk Fysik

Karimi, A. (author): Swiss Federal Institute of Technology Lausanne, Switzerland

(creator_code:org_t)

AIP Publishing, 2007
2007
English.
In: Journal of Applied Physics. - : AIP Publishing. - 0021-8979 .- 1089-7550. ; 102:044314

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Abstract Subject headings

In order to investigate the stability of the cubic phase of Cr1−xAlxN at high AlN content, first principles calculations of magnetic properties, lattice parameters, electronic structure, and mixing enthalpies of the system were performed. The mixing enthalpy was calculated on a fine concentration mesh to make possible the accurate determination of its second concentration derivative. The results are compared to calculations performed for the related compound Ti1−xAlxN and with experiments. The mixing enthalpy is discussed in the context of isostructural spinodal decomposition. It is shown that the magnetism is the key to understand the difference between the Cr- and Ti-containing systems. Cr1−xAlxN turns out to be more stable against spinodal decomposition than Ti1−xAlxN, especially for AlN-rich samples which are of interest in cutting tools applications.

By the author/editor: Alling, Björn, 1 ...; Marten, Tobias, ...; Abrikosov, Igor, ...; Karimi, A.

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